JP6695557B2 - End retainer - Google Patents

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an end holding tool used when attaching a tie rod to a member in order to reinforce various wooden structures.

  In various wooden structures such as wooden constructions, distantly arranged members may be pulled together by tie rods to improve rigidity. The tie rod is a metal part and may impair the natural atmosphere of wooden construction, but it is completely covered in the attic or inside the wall, and does not affect the aesthetics. Note that the tie rod cannot transmit a compressive load due to its property, and therefore, in order to use it as a brace, it is necessary to take measures such as arranging it in an X shape. When using the tie rods, be careful about condensation and rust.

  As an example of the technique of using a tie rod to reinforce the skeleton of a wooden building, the following patent document is cited, and in the patent document 1, a bracing tightening tool for strongly coupling members is disclosed. This brace tightening device has the function of arranging a brace bolt in a space composed of a vertical beam and a horizontal member, and has a curved surface part for attaching the brace bolt and both ends of this curved part. And a linear mounting portion formed in. Then, the attachment part of the brace tightening tool extends so as to face the center of the curved surface part, one of which is in contact with the vertical cross member, the other is in contact with the horizontal bridge member, and is fixed to the member with bolts and nuts. To be done. Further, the curved surface portion is provided with a long hole extending in the circumferential direction, and the pull-out angle of the brace can be freely adjusted within a predetermined range. The bracing bolt here corresponds to a tie rod.

  The following Patent Document 2 discloses a truss structure for constructing a roof portion of a house. This structure is intended to realize weight reduction and simplification of assembly work, and is composed of climbing beams, horizontal beams, climbing beam bundles, diagonal members, etc. Then, the horizontal beam connects the lower ends of the left and right climbing beams. The climbing beam bundle vertically connects the climbing beam and the horizontal beam, and the remaining diagonal members connect the climbing beam and the horizontal beam in an oblique direction. Then, in this document, the loads acting on the individual components were investigated, focusing on the fact that the compressive load does not act on a part of the climbing beam bundle and the diagonal members, and using braces cut out from these There is. The brace here is equivalent to a tie rod, is lighter in weight than steel, and is easy to attach to the truss structure and adjust tension, thus simplifying the assembly work.

Japanese Utility Model Publication No. 31-018218 Japanese Patent Laid-Open No. 06-306991

  In recent years, wooden construction has made it possible to realize a unique skeletal structure that has never existed before, thanks to improvements in the manufacturing technology for laminated lumber and the evolution of metal parts that connect members together. One example is the wooden dome. .. There are various methods of constructing this wooden dome, but the simplest method is to arrange columns that are curved in an arch in a ring shape and close adjacent columns with a plate material. The lower ends of the pillars are arranged at equal angles along the outer edge of the dome, but at the upper end of the pillars, they all come together at one point. Therefore, in the lower part of the pillar, the distance between the adjacent pillars becomes wider and the deformation is likely to occur, and as a countermeasure, the adjacent pillars may be connected by a tie rod.

  When a tie rod is attached to a member in order to reinforce a wooden structure having a complicated shape such as this wooden dome, the withdrawing direction is often not a right angle with respect to the side surface of the member but is oblique. Therefore, it is desirable that the means for attaching one end of the tie rod to the member be able to cope with changes in the pulling direction. In addition, the skeleton of a wooden dome is often exposed intentionally, and it is necessary to give sufficient consideration to the aesthetic appearance of the tie-rod attachment points.

  The present invention was developed on the basis of such an actual situation, and in order to reinforce various wooden structures, it is used when attaching a tie rod to a member, the pulling direction of the tie rod can be adjusted, and the end holding tool which is also aesthetically considered. It is intended to be provided.

  The invention according to claim 1 for solving the above-mentioned problems is a terminal retainer used for attaching one end of a tie rod to various members such as arched columns, and a tubular shape to be embedded in an embedding hole provided in the member. Of the main body, a movable piece housed in the inner space of the main body, and a cap that closes the end surface of the main body. The movable piece is provided with a connecting screw that is screwed with a male screw provided at the end of the tie rod. The cap is provided with an outlet through which the tie rod screwed with the connecting screw is passed, and the cap is fixed to the main body with a bolt or the like to prevent the movable piece from falling off and to prevent the tie rod from falling off. A guide groove extending in the axial direction of the main body is provided on the inner peripheral surface of the inner space, and the movable piece is provided with a convex portion that fits into the guide groove. The convex portion prevents the movable piece from rotating about the axis of the main body, and the movable piece can swing about the axis of the convex portion. It is characterized by being adjustable.

  The terminal retainer according to the present invention is used to attach one end of a tie rod to a member in various wooden structures including wooden construction, and it is premised that the member is wood (including various laminated wood). However, it is not limited to a particular application such as a pillar or a beam, and can be used for general purposes. The end holder is mainly composed of three elements: a main body, a movable piece and a cap. Two tie rods are arranged back-to-back with respect to one set of end holding tools, but there may be one tie rod only on one side depending on the application.

  The main body is a tubular metal part, and is embedded in an embedding hole machined into the member. Here, the internal space of the main body is referred to as an internal space, and the internal space penetrates both end surfaces of the main body. Also, the buried hole is finished in a size that allows the main body to be embedded without loosening. Therefore, after construction, almost the entire area of the main body is embedded in the member. In addition, the main body and the buried hole shall have a circular cross section in principle. In addition, the buried hole may penetrate both side surfaces of the member or may have a bottom.

  The movable piece is a metal component that is integrated with the end of the tie rod and is housed in the inner space of the main body. Further, since one tie rod is integrated with one movable piece, when the two tie rods are pulled out, the two movable pieces are arranged in the inner space. Then, the movable piece adjusts the dimensions of each part so that the movable piece can be displaced along the axial direction of the main body. Further, in order to integrate the movable piece and the tie rod, a female screw-shaped connecting screw is formed at the center of the movable piece. In addition, it is premised that a male screw is formed at the end of the tie rod so as to be screwed with the connecting screw.

  The connecting screw penetrates the movable piece, and the end of the tie rod can pass through the movable piece and be exposed. Therefore, the tension acting on the tie rod is transmitted to the movable piece through the entire connecting screw, and local stress concentration can be prevented. The male screw of the tie rod may be a left screw instead of the right screw, and the connecting screw of the movable piece may be the left screw instead of the right screw.

  The cap is a plate that covers the end surface of the main body, and prevents the movable piece from falling off by closing the inner space. Therefore, the cap is provided with an outlet for passing a tie rod. As a general rule, two caps are used for one main body to cover both end surfaces of the main body, but in the case where there is only one tie rod, there may be only one cap. Further, the cap needs to be integrated with the main body, and a bolt is usually used as the means. This bolt is inserted into a round hole provided in the cap and screwed into a fixing screw of the main body.

  When tension acts on the tie rod integrated with the movable piece, the movable piece housed in the inner space is displaced and eventually comes into contact with the cap, so that the tension is transmitted to the main body through the cap. Therefore, the cap needs to be firmly attached to the main body. Further, the cap may have a larger diameter than the main body, and the outer edge of the cap may be brought into contact with the surface of the member. If two such caps are used and the member is sandwiched between them, the end holder is inevitably fixed to the member. The method of fixing the end holding tool to the member can be freely selected other than the sandwiching by the two caps 31 mentioned here.

  The guide groove is a groove formed by cutting the inner peripheral surface of the inner space of the main body, extends in the axial direction of the main body, and is arranged symmetrically with the central axis sandwiched. In addition, the movable piece is provided with a convex portion that fits into the guide groove, and the convex portion fits into the guide groove so that the movable piece cannot rotate about the axis of the main body. Adjust the dimensions. This prevents the movable piece from rotating naturally in the inner space and canceling the screw engagement with the tie rod. Although the convex portion cannot be removed from the guide groove, the movable piece can be freely displaced along the guide groove.

  In addition, the movable piece housed in the inner space adjusts the size of each part so that the movable piece can freely swing about the axis of the convex portion. By this swinging, it becomes possible to adjust the pull-out direction of the tie rod integrated with the movable piece, and it is possible to have a predetermined crossing angle in addition to a right angle with respect to the side surface of the member. The outlet provided in the cap has a size that allows the tie rod to swing.

  In this way, the terminal retainer used for attaching the tie rod to the member is configured by centering on the three elements of the main body, the movable piece, and the cap, the movable piece and the tie rod are integrated, and the movable piece swings inside the main body. By being free, the pulling direction of the tie rod can be adjusted within a predetermined range. Further, after the construction, only the cap is exposed on the surface of the member, and the main body and the movable piece are hidden behind them. Therefore, the tie rod extends from the center of the cap to have a simple appearance, which does not deteriorate the appearance.

  According to the first aspect of the invention, the terminal retainer mainly comprises three elements: the main body, the movable piece, and the cap, and the movable piece is swingably housed in the inner space of the main body. It becomes possible to adjust the pull-out direction of the tie rod within a predetermined range by integrating the above. Moreover, the movable piece does not freely rotate due to the fitting of the guide groove and the convex portion, and the loose engagement of the movable piece and the tie rod does not occur.

  Further, according to the present invention, the cap is arranged on the surface of the member, the main body and the movable piece are covered with the inner part thereof, and the tie rod extends from the center of the cap to provide a simple appearance, which does not deteriorate the appearance. Therefore, even if the skeleton of a wooden dome is intentionally exposed, it can be used without difficulty. The cap can also be embedded in the member, and the surfaces of the member and the cap can be arranged without a step to further improve the appearance.

FIG. 1 is a perspective view showing an example of the shape of a terminal holder according to the present invention and an example of its use. A wooden dome composed of a total of six arch-shaped columns is drawn at the upper left of the figure. FIG. 2 is a perspective view showing a process of incorporating the terminal retainer of FIG. 1 into an arch-shaped column. The upper part of the figure shows a state before the main body is embedded, and the lower part of the figure shows a state after the embedded body. The state is drawn. It is a perspective view which shows the state after incorporating the terminal retainer of FIG. 1 in an arch column, and the internal structure of an terminal retainer. FIG. 2 is a perspective view showing a configuration example of a terminal retainer different from FIG. 1, and it is assumed that one tie rod is attached to an upright material that rises linearly, and the tension acting on the tie rod is upright via a lag screw. It is transmitted to the material. FIG. 5 is a perspective view showing a process of embedding the terminal retainer of FIG. 4 in an upright member, and the upright member is drawn in a vertical cross section in the upper part of the drawing.

  FIG. 1 shows an example of the shape of a terminal holder according to the present invention and an example of its use. A wooden dome composed of a total of six arch-shaped columns 41 is drawn at the upper left of FIG. The arch-shaped column 41 is a member bent to a predetermined radius, and is made of wood such as laminated wood. A total of six pieces are arranged at an equal angle, and these are gathered at one point at the top to form the skeleton of the wooden dome. Form. Then, the adjacent arch-shaped pillars 41 have a wider interval as they go downward, so that the rigidity decreases near the middle thereof, and the displacement easily occurs. Therefore, adjacent arch-shaped columns 41 are connected by tie rods 46 to cancel the decrease in rigidity. The tie rods 46 are arranged so as to make one round around the wooden dome without interruption.

  An end holding tool for attaching the tie rod 46 to the arch-shaped column 41 is mainly composed of the main body 11, the movable piece 21, and the cap 31. The main body 11 is a cylindrical metal part, and is embedded in the embedding hole 42 formed in the arch-shaped column 41. The embedding hole 42 penetrates both side surfaces of the arch-shaped column 41, and is finished to have an inner diameter that allows the main body 11 to be embedded without loosening. Further, an inner space 12 penetrating both end surfaces is provided near the center of the main body 11. Although the inner space 12 has a circular cross section, semicircular guide grooves 13 are provided at two upper and lower positions. The guide groove 13 also penetrates both end surfaces of the main body 11 without interruption.

  The movable piece 21 is a metal part that is housed in the inner space 12 of the main body 11 and basically has a cylindrical shape, and a small-diameter convex portion 23 extends in the upper and lower centers thereof. The movable piece 21 is large enough to be housed in the inner space 12, and the convex portion 23 fits in the guide groove 13. The dimensions of each part are adjusted so that the engagement between the guide groove 13 and the protrusion 23 can be maintained even when the posture of the movable piece 21 changes in the inner space 12. Therefore, the movable piece 21 can be displaced along the axial direction of the main body 11, but cannot rotate about the axial direction of the main body 11.

  A connecting screw 27 is formed at the center of the movable piece 21. The connecting screw 27 plays a role of screwing with the male screw 47 of the tie rod 46. The connecting screw 27 penetrates the movable piece 21, and the end portion of the tie rod 46 can pass through the movable piece 21 and be projected to prevent the tie rod 46 from coming off the movable piece 21. In addition, in FIG. 1, tie rods 46 are attached to both side surfaces of the arch-shaped column 41. Therefore, two movable pieces 21 are used for one main body 11.

  The cap 31 is a circular metal plate and plays a role of contacting the end surface of the main body 11 to close the inner space 12 and confine the movable piece 21. Further, the cap 31 of FIG. 1 also plays a role of fixing the main body 11 to the arch-shaped column 41, and both end surfaces of the main body 11 are closed by two caps 31 having the same shape. Further, the cap 31 is attached to the main body 11 using the bolt 39. Therefore, a round hole 35 is provided in the cap 31 for inserting the shaft portion of the bolt 39, and a fixing screw 15 that is screwed with the bolt 39 is formed on each end surface of the main body 11. In FIG. 1, one cap 31 is attached with two bolts 39. In addition, an outlet 36 is provided in the center of the cap 31 for passing the tie rod 46. The outlet 36 has a horizontally elongated slot shape in consideration of the swing of the tie rod 46.

  In FIG. 1, the cap 31 is embedded near the surface of the arch-shaped column 41 in consideration of aesthetics. Therefore, a frame groove 43 having an enlarged inner diameter is formed at both ends of the buried hole 42. The extension of the main body 11 is equal to the distance between the facing two rows of frame grooves 43, and when the cap 31 is attached to the main body 11 embedded in the embedding hole 42, the main body 11 is inevitably undisplaceable. In addition, the back surface of the cap 31 is provided with two protrusions 33 at two positions. By fitting this into the guide groove 13, the cap 31 cannot rotate with respect to the main body 11, and the round hole 35 and the fixing screw 15 are Concentric alignment facilitates insertion of bolts 39.

  FIG. 2 illustrates the process of incorporating the end retainer of FIG. 1 into the arched post 41. As illustrated in the upper part of FIG. 2, a buried hole 42 and a frame groove 43 are previously processed in the arch-shaped column 41. The embedded hole 42 has an inner diameter that allows the main body 11 to be embedded without loosening, and the extension of the embedded hole 42 (extension in the range deeper than the forehead groove 43) is equal to the extension of the main body 11. Also in the frame groove 43, the inner diameter that allows the cap 31 to be embedded without a gap, and the surface of the embedded cap 31 is aligned with the side surface of the arched column 41 without a step.

  Two movable pieces 21 are used for one main body 11, and tie rods 46 can be attached to both side surfaces of the arch-shaped column 41. Further, both end surfaces of the main body 11 are closed with caps 31 so that the movable piece 21 does not separate from the main body 11. When assembling the terminal retainer, first, the main body 11 is embedded in the embedding hole 42, then the tie rod 46 is inserted into the outlet 36 of each of the two caps 31, and then the connecting screw 27 of the movable piece 21 is inserted. The male screw 47 of the tie rod 46 is screwed onto the end of the tie rod 46 to expose the end of the tie rod 46 from the movable piece 21.

  In this way, after attaching the tie rod 46 to the movable piece 21, the movable piece 21 is housed in the inner space 12 of the main body 11, the cap 31 is fitted in the forehead groove 43, and the bolt 39 is attached. A tie rod 46 is attached. In addition, the main body 11 is provided with an extension capable of accommodating the two movable pieces 21 with a margin. Further, the movable piece 21 can be swung about the upper and lower convex portions 23, and the withdrawal direction of the tie rod 46 can be adjusted, and accordingly, the outlet 36 of the cap 31 has a horizontally elongated slot shape. is there.

  FIG. 3 shows a state after the end retainer of FIG. 1 is incorporated in the arch-shaped column 41 and an internal structure of the end retainer. The two caps 31 are embedded in the frame groove 43 of the arch-shaped column 41 without any step, and the tie rod 46 projects from the outlet 36 of the cap 31. As described above, the end retainer can be used by embedding it in a member such as the arch-shaped column 41, and the movable piece 21 attached to the tie rod 46 is also covered, so that there is no factor that impairs the appearance. The head of the bolt 39 may be embedded in the cap 31 in order to further improve the appearance.

  In the lower part of FIG. 3, an internal structure in which the main body 11 and the cap 31 are divided in half is drawn, and two movable pieces 21 are arranged in the inner space 12 of the main body 11. The upper and lower convex portions 23 of the movable piece 21 are fitted in the guide groove 13 of the main body 11. The projections 23 have their respective dimensions adjusted so that they cannot be removed from the guide groove 13, and the movable piece 21 does not rotate (rotate about the axis of the main body 11). Further, by swinging the movable piece 21 around the convex portion 23, the pull-out direction of the tie rod 46 can be adjusted, and the tie rod 46 can be obliquely attached to the side surface of the member as in the wooden dome of FIG. You can

  The tension acting on the tie rod 46 is transmitted from the movable piece 21 to the main body 11 via the cap 31. Therefore, it is necessary to give sufficient strength to the contact portion between the movable piece 21 and the cap 31 and the bolt 39 for attaching the cap 31. Further, in FIG. 3, the arch groove 43 is processed into the frame groove 43 and the cap 31 is embedded therein, but the frame groove 43 may be omitted and the cap 31 may be placed on the surface of the member. In this case, it is desirable that the buried hole 42 and the extension of the main body 11 are aligned.

  The terminal retainer according to the present invention can be incorporated into any member capable of processing the buried hole 42, and is not limited to the arched column 41 as a matter of course. Further, there are various methods of fixing the end holder to various members, such as sandwiching the two caps 31 and inserting nails from the main body 11 or the cap 31 toward the members. In addition, the two tie rods 46 are, as a rule, arranged back to back, but depending on the situation such as the end of a building, only one may be provided.

  FIG. 4 shows a configuration example of a terminal retainer different from that of FIG. 1, and it is assumed that one tie rod 46 is attached to an upright member 48 that rises linearly, and the tension acting on the tie rod 46 is the lag screw. It is transmitted to the upright 48 via 61. In FIG. 4, the tie rod 46 is one and the movable piece 21 is also one. Since the lag screw 61 is used, the cap 31 has the same outer diameter as the main body 11. Further, in consideration of aesthetics, a counterbore 37 is provided on the inlet side of the round hole 35 of the cap 31, and the head of the bolt 39 is embedded. The buried hole 42 processed into the upright 48 has a bottom without penetrating the opposite surface due to the balance with the lag screw 61, and its depth is such that the caps 31 are lined up on the side surface of the upright 48 without steps. It is adjusted.

  A back cap 51 is attached to one of both end surfaces of the main body 11 where the tie rod 46 is not arranged (right side in the drawing). The back cap 51 also has the common point that it is attached to the main body 11 with the bolt 39. The back cap 51 has a counterbore 57 and a round hole 55 corresponding to the bolt 39, and the end face of the main body 11 is provided. A fixing screw 15 that is screwed with the bolt 39 is formed. A female screw 56 is formed at the center of the back cap 51.

  The lag screw 61 has a columnar shape, and a convex strip 62 extending in a spiral shape is projected on the side peripheral surface thereof, and a hexagonal head 63 is formed on one end surface thereof so as to hang a tool at the time of embedding. Further, a central hole 64 penetrating both end faces is provided at the center. Then, the lag screw 61 is embedded in the small hole 44 concentric with the embedding hole 42 and receives the tension acting on the tie rod 46. The small hole 44 reaches the bottom surface of the embedded hole 42 from the side surface of the upright member 48, and the ridge screw 62 bites into the inner peripheral surface of the small hole 44, whereby the lag screw 61 is fixed to the upright member 48.

  The terminal retainer embedded in the embedding hole 42 is integrated with the lag screw 61 via the pull bolt 58. The tip of the pulling bolt 58 is inserted into the central hole 64 of the lag screw 61 and screwed with the pulling screw 56 of the back cap 51 to draw the end holding tool toward the lag screw 61 and to apply the tension acting on the tie rod 46. introduce. The extension of the fine hole 44 is adjusted so as to accommodate the lag screw 61 and the head portion of the pull bolt 58, and there is nothing protruding from the fine hole 44 after construction.

  FIG. 5 shows the process of embedding the end retainer of FIG. 4 in the uprights 48, and the uprights 48 are depicted in a vertical cross section in the upper part of the drawing. The lag screw 61 bites into the small hole 44 and is fixed, and further, the back cap 51 is pulled to the lag screw 61 by the pull bolt 58, and the tension acting on the tie rod 46 is erected upright via the lag screw 61. It is transmitted to the material 48.

  In FIG. 5, the embedding amount of the lag screw 61 is adjusted, and one end surface of the lag screw 61 is aligned with the bottom surface of the embedding hole 42 without any step and contacts the back cap 51. The depth of the embedding hole 42 is adjusted so as to embed all of the main body 11, the cap 31, and the back cap 51, and the surfaces of both the upright member 48 and the cap 31 are lined up without a step. Further, the head of the pull bolt 58 is housed in the narrow hole 44. Therefore, after the construction, only the tie rod 46 projects from the side surface of the upright member 48, and the movable piece 21 and the like are covered, which is excellent in appearance. The head of the bolt 39 inserted into the back cap 51 is housed in the counterbore 57, and the back cap 51 contacts the bottom surface of the embedding hole 42.

11 main body 12 inner space 13 guide groove 15 fixing screw 21 movable piece 23 convex portion 27 connecting screw 31 cap 33 protrusion 35 round hole 36 outlet 37 counterbore 39 bolt 41 arched column (member)
42 Buried hole 43 Frame groove 44 Fine hole 46 Tie rod 47 Male screw 48 Upright material (member)
51 Back Cap 55 Round Hole 56 Drawing Screw 57 Counterbore 58 Drawing Bolt 61 Lag Screw 62 Convex Line 63 Head 64 Medium Hole

Claims (1)

A terminal retainer used to attach one end of a tie rod (46) to various members such as an arched column (41),
A cylindrical main body (11) to be embedded in an embedding hole (42) provided in the member, a movable piece (21) to be housed in an inner space (12) of the main body (11), and an end surface of the main body (11). It consists of a closing cap (31),
The movable piece (21) is formed with a connecting screw (27) that is screwed with the male screw (47) provided at the end of the tie rod (46),
The cap (31) is provided with an outlet (36) for passing the tie rod (46) screwed with the connecting screw (27),
By fixing the cap (31) to the main body (11) with a bolt (39) or the like, the movable piece (21) is prevented from falling off, and one end of the tie rod (46) is moored.
A guide groove (13) extending in the axial direction of the main body (11) is provided on the inner peripheral surface of the inner space (12), and the movable piece (21) is fitted into the guide groove (13). A protrusion (23) to be inserted, and the guide groove (13) and the protrusion (23) prevent the movable piece (21) from rotating around the axis of the main body (11),
The terminal retainer characterized in that the movable piece (21) can be swung about the axis of the convex portion (23), and the pulling direction of the tie rod (46) can be adjusted by this swing.

Images